JPH08270863A - Pipe clamp - Google Patents

Abstract

PURPOSE: To increase a reliability of pipe holding by providing a first support body which supports each ratchet rotatably in a direction crossed relative to the axial direction of a clamp body crossed relative to the axial direction of a slider. CONSTITUTION: Three hole parts 21 of a clamp body 11 and three hole parts 22 of a slider are combined overlapped with each other. Also a ratchet 23 is arranged at three combined parts formed with three hole parts 21 of the clamp body 11 and three hole parts 22 of the slider 19 overlapped with each other. Then three ratchets 23 are arranged in the hole parts 21 of the clamp body 11 and the overlapped hole parts 22 of the slider along the radial direction of the clamp body 11. In addition, each ratchet 23 is supported rotatably on the support ring 24 of a first support body provided on the clamp body 11 and a support ring 25 of a second support body provided on the slider 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe clamp used for holding a pipe and connecting the pipe to another pipe or closing the pipe.

[0002]

2. Description of the Related Art In this type of pipe clamp, a clamp main body connected to the pipe is provided with a mechanism for holding the pipe, and the pipe clamp can be attached to the pipe without forming a threaded portion. This pipe clamp connects the ends of the pipes installed in these devices to the pipes of other devices, for example, when testing compressors, receivers, separators, etc. of refrigerators individually before assembling. Used to close or close the end of a pipe.

Conventionally, as this pipe clamp, there is one having a structure shown in FIGS. 5 and 6 (Jitsuko 51-9055).
reference). That is, in this pipe clamp, a clamp body 2 having a cylindrical body is provided with a clamp lever 2 having a holding hole 3 so as to be tiltable by a pin 4, and the clamp lever 2 is engaged to move the clamp lever 2 for operating the clamp lever 2. A ring 5 is movably provided on the outer peripheral portion of the clamp body 1, and a spring 6 that applies a clamping force to the clamp lever 2 is provided between the clamp lever 2 and the clamp body 1.

When the pipe P is clamped, the movable ring 5 is manually moved against the spring force of the spring 6 and the clamp lever 2 is tilted so as to stand up, and the pipe P of the clamp body 1 is moved. It is inserted through the inside and the holding hole 3 of the clamp lever 2. Then, when the hand is released from the moving ring 5, the clamp lever 2 is pushed by the spring 6 and tilts, the inner peripheral edge of the holding hole 3 of the clamp lever 2 contacts the outer peripheral surface of the pipe P, and the pipe P is clamped. It is held by the holding hole 3 of. The moving ring 5 is also pushed by the clamp lever 2 and returns to its original position.

[0005]

However, this pipe clamp has the following problems. That is, in the conventional pipe clamp, when the pipe P is clamped, the clamp lever 2 is pushed by the spring 6 and tilted obliquely so that the upper center point and the lower center point of the inner peripheral edge of the holding hole 3 of the clamp lever 2 are the pipe. The pipe P is held in contact with the outer peripheral surface of P. As described above, in the conventional pipe clamp, since the pipe P is held only at two positions in the circumferential direction,
There is a limit to the reliability of holding the pipe P, and when a force is applied to the pipe clamp or the pipe P in a direction in which they both come out, the pipe clamp or the pipe P may come out of the other side.

For this reason, it has been conventionally required to improve the reliability of holding the pipe P by the pipe clamp.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe clamp with improved reliability for holding a pipe.

[0008]

In order to achieve the above object, the pipe clamp of the present invention has a cylindrical body and has holes penetrating to the inner and outer peripheral portions formed at a plurality of positions at equal intervals in the circumferential direction. A clamp body into which the pipe is inserted,
A slider having a cylindrical shape, movably fitted in the outer peripheral portion of the clamp body in the axial direction thereof, and having holes penetrating the inner and outer peripheral portions at positions overlapping with the respective hole portions of the clamp body; A plurality of ratchets that are respectively arranged over the holes of the main body and the holes of the slider that overlap the holes of the clamp body and that grip the pipes inserted into the inside of the clamp body from the outer peripheral side; A first support body that rotatably supports each of the ratchets in a direction intersecting the axial direction of the clamp body and the slider, and is provided at a position different from the first support body in the axial direction. A second support for rotatably supporting each ratchet in a direction intersecting the axial direction of the slider, and the ratchet in front of the slider. A spring that applies a force in a direction for rotationally displacing toward the center of the clamp body, and a lever that is provided on the clamp body and moves the slider in a direction for rotationally displacing the ratchet toward the outer peripheral portion of the clamp body. And is provided.

[0009]

[Function] Three or more holes formed in the circumferential wall of the clamp body at intervals in the circumferential direction, and a slider movably fitted in the clamp body at intervals in the circumferential direction. A ratchet is provided at each of the portions where the three or more holes formed are overlapped with each other, and the three or more ratchets are provided on the first support body provided on the clamp body and the first support body in the axial direction of the slider. And a second support member provided at a position different from that of the clamp body rotatably support the clamp body in a direction intersecting the axial direction of the clamp body. A force is applied in a direction to rotate and displace toward (the direction in which the pipe inserted into the clamp body is gripped), and each ratchet is separated from the outer peripheral portion of the clamp body (from the pipe inserted inside the clamp body). It is provided with a lever for moving the slider in the direction to rotationally displaced toward the direction).

When the pipe is inserted into the clamp body, the tip of each ratchet whose tip is displaced toward the center of the clamp body is pushed toward the outer periphery of the clamp body. Therefore, each ratchet pivotally displaces around the first support body toward the outer peripheral portion of the clamp body, and a force for rotating each ratchet is applied to the slider via the second support body, so that the slider is moved. It moves on the outer circumference of the clamp body against the spring force of the spring. This allows each ratchet to rotate toward the outer periphery of the clamp body.

When the pipe advances inside the clamp body and the tip of the pipe goes beyond the tip of each ratchet and the tip of each ratchet comes into contact with the outer peripheral portion of the pipe, the tip of the pipe moves each ratchet to the clamp body. The pushing force toward the outer peripheral portion is released. Then, the sliders pushed by the springs move the ratchets toward the center of the clamp body so as to rotate. The movement of the slider is the second
The ratchets are added to the ratchets via the support members, and the ratchets rotate about the first support member toward the central portion of the clamp body. As a result, the tip of each ratchet receives the force of the spring and bites into the outer peripheral portion of the pipe to grip the pipe.

Here, even if a force for pulling out from the clamp main body is applied to the pipe, the force for pulling out from the clamp main body applied to this pipe causes the ratchet and the second ratchet supported by the first support body. The force acting on the slider via the support in the direction of rotating each ratchet toward the outer peripheral portion of the clamp body is small due to the combination of the ratchet and the slider, and the spring acts on the slider with respect to each slider. The force applied in the direction of rotating the ratchet toward the center of the clamp body is far less than that applied. Therefore, even if a force is applied to the pipe to pull it out from the clamp body, the pipe will not come off the ratchets and be pulled out from the clamp body.

Therefore, the pipe inserted inside the clamp body is firmly held by the clamp body by three or more ratchets. Further, the operation of holding the pipe by the pipe clamp is very easy because the ratchet and slider automatically operate to hold the pipe by inserting the pipe into the clamp body.

Next, when removing the pipe from the clamp body, the lever is operated against the spring force of the spring to move the slider and the ratchet to the outer peripheral portion of the clamp body (from the pipe inserted inside the clamp body). It is moved in the direction in which it is rotationally displaced toward the direction of leaving. A force for moving the slider is applied to each ratchet via the second support, and each ratchet rotates about the first support toward the outer peripheral portion of the clamp body. As a result, the tip of each ratchet separates from the outer peripheral surface of the pipe, and the holding of the pipe by each ratchet is released. Therefore, since the pipe can be detached from the clamp body by a simple operation of operating the slider with the lever, the pipe can be easily detached from the clamp body.

[0015]

Embodiments of the present invention will be described with reference to the drawings. A pipe clamp according to an embodiment of the present invention will be described with reference to FIGS. 1, 2 and 4.

In the pipe clamp of this embodiment, for example, when testing a compressor of a refrigerator, a liquid receiver, a separator, etc. independently before assembling, the ends of the pipes provided in these devices are connected to other devices. It is used to connect to the pipe. FIG. 1 is a partially cutaway front view of a pipe clamp showing a state where a pipe is clamped, and FIG. 2 is a partially cutaway front view of a pipe clamp showing a state where a pipe is unclamped,
FIG. 4 is a side view of the pipe clamp. FIG. 4 is also used as a side view of a pipe clamp of another embodiment described later.

Reference numeral 11 in the drawing denotes a clamp body which is a cylindrical body having both ends open, and a pipe P is inserted into one end portion (the left end portion in the drawing) of the clamp body. Reference numeral 12 denotes an auxiliary cylinder having a cylindrical body with both ends open. One end of the auxiliary cylinder 12 has a clamp main body 11
It is located on the same axis as, and is inserted into the other end portion (right end portion in the drawing) of the clamp body 11 and screwed into the clamp body 11.

Reference numeral 13 denotes a cylindrical seal cylinder, which is located on the same axial line over the inner hole of the clamp body 11 and the inner hole of the auxiliary cylinder 12 and is movably arranged in the axial direction. A force is applied to the seal cylinder 13 leftward in the drawing by a compression coil spring 16 arranged between the other end of the seal cylinder 13 and a step portion 15 formed in the inner hole of the auxiliary cylinder 12. One end of the seal cylinder 13 abuts on a ring-shaped rib 14 formed in the inner hole of the clamp body 11, and the leftward movement in the drawing is restricted.

A packing 17 is attached to one end of the seal cylinder 13, and the clamp body 11 is provided on the outer peripheral portion.
A seal ring 18 that is slidably in contact with the inner peripheral surface of the inner hole is attached.

Reference numeral 19 denotes a slider having a cylindrical body with both ends open, which is movably fitted to the outer peripheral portion of the clamp body 11 so as to be positioned on the same axis as this. That is, the slider 19 has the ratchet 23, which will be described later, in the central portion of the clamp body 11, that is, the clamp body 11.
The ratchet 23 is moved away from the outer peripheral portion of the clamp body 11, that is, the pipe P inserted into the clamp body 11 in a direction in which the pipe P inserted into the inside of the clamp body is rotationally displaced toward the gripping direction (direction A in the drawing). It is provided so as to be movable in the direction (direction B in the drawing) for rotational displacement.

The outer peripheral portion of the clamp body 11 and the slider 19
A compression coil spring 20 is arranged in the gap formed in the inner peripheral portion of the slider 19, and a force is applied to the slider 19 in the direction A in the figure by the compression coil spring 20.

The slider 19 is prevented from moving in the A direction by a stopper 30 formed on the auxiliary cylinder 12 as described later.

Three holes 21 are formed at one end of the clamp body 11 at positions at equal intervals in the circumferential direction. These three holes 21 penetrate the inside and outside of the peripheral wall of the clamp body 11, are formed as elongated holes along the axial direction of the clamp body 11, and are open at one end of the clamp body 11 in this embodiment. Has been done. This is because it does not hinder the rotation of the ratchet 23 described later.

Further, three holes 22 are formed at one end of the slider 19 at positions overlapping with the three holes 21 of the clamp body 11. These three holes 22 penetrate the inside and outside of the peripheral wall of the slider 19, are formed as elongated holes along the axial direction of the slider 19, and are opened at one end of the slider 19 in this embodiment. . This is because it does not hinder the rotation of the ratchet 23 described later.

As a result, the three holes 21 of the clamp body 11 and the three holes 22 of the slider 19 are superposed and combined with each other. And 3 of the clamp body 11
Ratchets 23 are respectively arranged in three sets of combined portions in which the individual hole portions 21 and the three respective hole portions 22 of the slider 19 which overlap with the individual hole portions 21 are combined.

These three ratchets 23 are arranged along the radial direction of the clamp body 11 in the hole portion 21 of the clamp body 11 and the hole portion 22 of the slider 19 that overlaps with the ratchet body 23. 1
1. A support ring 2 which is an example of a first support body provided in
4 and a support ring 25, which is an example of a second support provided on the slider 19, are rotatably supported.

The support ring 24 is a circular ring formed of a wire having a round cross section, and is fitted in an annular groove 26 formed in the circumferential wall of the inner hole of the clamp body 11 along the circumferential direction. The support ring 24 is inserted into the holes formed in the three ratchets 23, and supports each ratchet 23 along the direction transverse to the axial direction of the clamp body 11. The support ring 25 is a circular ring formed of a wire having a round cross section, and is fitted in an annular groove 27 formed in the circumferential wall of the inner hole of the slider 19 along the circumferential direction. The support ring 25 is inserted into holes formed in the three ratchets 23, and supports each ratchet 23 along a direction transverse to the axial direction of the clamp body 11.

The position where the support rings 24 and 25 support the ratchet 23 will now be described. As shown in FIG. 1, the slider 19 does not apply an external force and the compression coil spring 20
When the clamp body 1 is pushed in the direction A in the drawing,
In the axial direction of 1, the support ring 25 is located on the A side in the drawing with respect to the support ring 24, so that each ratchet 23 is inserted into the central portion of the clamp body 11, that is, the inside of the clamp body 11. Is rotated and displaced in the direction of gripping (direction C in the drawing).

Further, as shown in FIG. 2, when the slider 19 is pushed in the B direction shown in the drawing, the support ring 25 is located on the B direction side in the drawing with respect to the support ring 24 in the axial direction of the clamp body 11. , So each ratchet 2
3 is rotationally displaced toward the outer peripheral portion of the clamp body 11, that is, in the direction away from the pipe P inserted in the clamp body 11 (direction D in the drawing).

Numeral 28 is a lever, which is a holding hole portion 28a having a holding hole fitted to the outer peripheral portion of the auxiliary cylinder 12 and a continuous handle portion 28b bent in relation to the holding portion hole 28a. And have. The lever 28 moves the slider 19 in the direction B shown in the drawing in which each ratchet 23 is rotationally displaced in the direction D shown in the drawing by the tilting operation.

Reference numeral 29 is a lever receiving ring, which is fitted to the outer peripheral portion of the auxiliary cylinder 12 adjacent to the holding hole portion 28a of the lever 28, and is held when the lever 28 is tilted.
To receive.

Reference numeral 30 denotes a stopper formed on the outer peripheral portion of the auxiliary cylinder 12, which directly receives the lever receiving ring 29 pushed by the compression coil spring 20 and regulates the positions of the lever 28 and the slider 19. .

Reference numeral 31 is a threaded portion formed at the other end of the auxiliary cylinder 12, to which a pipe or the like not shown is connected.

The operation of the pipe clamp thus constructed will be described. When the pipe clamp is not used, the slider 19 is pushed in the direction A in the figure by the compression coil spring 20 as shown in FIG.
The movement of the lever 28 and the lever receiving ring 29, which have been pushed by, is restricted by the stopper 30 of the auxiliary cylinder 12.
In this case, the holding hole portion 28a of the lever 28 is positioned at right angles to the axial direction of the clamp body 11.

Then, as shown in FIG. 1, the clamp body 1
When the pipe P is inserted into the inside of 1, the tip end 23a of each ratchet 23 in which the tip of the pipe P is displaced toward the central portion of the clamp body 11 is pushed toward the outer peripheral portion of the clamp body 11. For this reason, each ratchet 23 is rotationally displaced in the direction D in the drawing around the support ring 24 that is the first support body, and the rotation force of each ratchet 23 is the support ring that is the second support body. The slider 19 is applied via 25 to the slider 19 and moves on the outer peripheral portion of the clamp body 11 in the direction B in the figure against the spring force of the compression coil spring 20. This enables each ratchet 23 to rotate toward the outer peripheral portion of the clamp body 11.

When the pipe P moves forward inside the clamp body 11 and the tip of the pipe P crosses the tip of each ratchet 23, the tip portion 23a of each ratchet 23 has a tip portion 23a.
1. Packing 17 for the seal cylinder 13 provided inside 1
To contact. Since the seal cylinder 13 is pushed by the coil spring 16, the tip of the pipe P and the packing 17 are pressed.
The space between and is reliably sealed.

The tip portion 23a of each ratchet 23
When the pipe comes into contact with the outer peripheral portion of the pipe P, the pipe P
The force of pushing the ratchet 23 toward the outer peripheral portion (D direction in the drawing) of the clamp body 11 by the tip of the is released. Then, the slider 19 pushed by the coil spring 20 is moved in a direction (direction A in the drawing) in which each ratchet 23 is rotated toward the center portion 11 (direction C in the drawing) of the clamp body.

The force with which the slider 19 moves causes the support ring 2 to move.
Join each ratchet 23 via 5, each ratchet 2
3 rotates around the support ring 24 toward the central portion (C direction in the drawing) of the clamp body 11. As a result, the tip portion 23a of each ratchet 23 receives the force of the coil spring 20 and bites into the outer peripheral portion of the pipe P to grip the pipe P.

Here, even if the pipe P receives a force in the direction of pulling out from the clamp main body 11, the ratchet 23 supported by the support ring 24 by the force in the direction of pulling out from the clamp main body 11 applied to the pipe P. And the slider 19 via the support ring 25 as shown in FIG.
The force acting in the direction becomes small due to the combination of the ratchet 23 and the slider 19 described above, and is far below the force that the coil spring 20 applies to the slider 19 in the direction A in the figure. Therefore, even if a force is applied to the pipe P so as to pull it out from the clamp body 11, the pipe P will not be detached from each ratchet 23 and pulled out from the clamp body 11.

As a result, the pipe P inserted inside the clamp body 11 is firmly held by the clamp body 11 by the three ratchets 23. The operation of holding the pipe P with the pipe clamp is performed by holding the pipe P in the clamp body 1
Ratchet 2 is automatically inserted by inserting inside 1.
3 and the slider 19 operate to hold the pipe P, which is very easy.

Next, when the pipe is removed from the clamp body 11, the lever 28 is operated against the spring force of the coil spring 20. That is, as shown in FIG. 2, when the handle portion 28b of the lever 28 is pushed toward the central portion of the clamp body 11, the holding hole portion 28a tilts about the upper center of the drawing as a fulcrum to move the slider 19 and the ratchet 23. It is pushed to move it in the direction B in the figure.

The force with which the slider 19 moves causes the support ring 2 to move.
Join each ratchet 23 via 5, each ratchet 2
3 rotates about the support ring 24 in the direction D in the drawing. As a result, the tip of each ratchet 23 is pipe P
Away from the outer peripheral surface of the pipe P by each ratchet 23
Is released. Therefore, the pipe P can be removed from the clamp body 11 by a simple operation of operating the slider 19 with the lever 28, so that the pipe P can be easily removed from the clamp body 11.

Further, the lever 11 is provided so as to tilt on the clamp body 11, and the tilting operation causes the slider 1 to move.
Since 9 is moved in the direction B in the figure, the operation of detaching the pipe P from the clamp body 11 by the lever 28 can be performed easily.

FIG. 3 shows another embodiment of the pipe clamp, in which the same parts as in FIG. 1 are designated by the same reference numerals. In this embodiment, the lever for operating the slider 19 is different from that of the embodiment shown in FIG. FIG. 4 is a side view of this pipe clamp.

That is, reference numeral 41 in the drawing denotes a lever, which is a combination of a gate-shaped portion 41a and a handle portion 41b in a substantially L-shape. A cylindrical body 44 is screwed onto the outer peripheral portion of the auxiliary cylinder 12. The lever 41 is arranged so that the gate-shaped portion 41 a straddles the outer peripheral portion of the auxiliary cylinder 12, and the gate-shaped portion 41 a
Is tiltably supported by a combination of a pin 42 penetrating the tubular body 44 and the auxiliary barrel 12 and a nut 43 screwed to the pin 42. In addition, the edge portion 41 of the gate-shaped portion 41a
C is in contact with a lever receiving ring 29 fitted to the clamp body 11 adjacent to the slider 19.

Then, the handle portion 41b is attached to the clamp body 11
When pushed toward, the gate-shaped portion 41a rotates about the pin 42, and the slider 19 is directed toward the direction B in the drawing at the edge 41 of the gate-shaped portion 41a against the spring force of the compression coil spring 20. Can be pushed. In this embodiment, the operation of detaching the pipe P from the clamp body 11 can be performed easily by operating the lever 41.

The present invention is not limited to the above-mentioned embodiments, but can be modified in various ways. For example, although three ratchets are provided in the pipe clamp of this embodiment, the invention is not limited to this, and four or more ratchets may be provided. Further, the seal mechanism provided inside the clamp body is not limited to the form of the above-described embodiment, and various other forms can be used.

[0048]

As described above, the pipe clamp of the present invention is movably fitted to the clamp body and three or more holes formed in the peripheral wall of the clamp body at intervals in the circumferential direction. A ratchet is provided in each portion where three or more hole portions formed at intervals in the circumferential direction overlap each other on the formed slider, and these three or more ratchets are provided on the clamp body. Of the support body and the second support body provided at a position different from the first support body in the axial direction of the slider, rotatably supported in a direction intersecting the axial direction of the clamp body, Furthermore, a spring is used to apply a force to the slider to rotate and displace each ratchet toward the center of the clamp body (direction to rotate and displace the pipe inserted inside the clamp body). , Latch The Tsu bets toward the outer peripheral portion of the clamp body is provided with a lever for moving the slider in the direction to be rotated and displaced.

With the pipe clamp according to the present invention, with this structure, the pipe inserted into the clamp body can be firmly held in the clamp body by three or more ratchets to improve the reliability of holding the pipe. Also,
The operation of holding the pipe by the pipe clamp is very easy because the ratchet and slider automatically operate to hold the pipe by inserting the pipe into the clamp body.

Furthermore, since the pipe can be removed from the clamp body by a simple operation of operating the slider with the lever, the operation of removing the pipe from the clamp body can be easily performed.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a pipe clamp according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing the pipe clamp of the embodiment.

FIG. 3 is a partially cutaway front view showing a pipe clamp according to another embodiment.

FIG. 4 is a side view showing a pipe clamp according to one embodiment and another embodiment.

FIG. 5 is a cross-sectional view showing a conventional pipe clamp as seen from the front.

FIG. 6 is a cross-sectional view showing a pipe clamp of the conventional example as seen from a side surface.

[Explanation of symbols]

 11 ... Clamp main body, 12 ... Auxiliary cylinder, 13 ... Seal cylinder, 19 ... Slider, 20 ... Compression coil spring, 21 ... Hole part, 22 ... Hole part, 23 ... Ratchet, 24 ... Support ring (first support body) , 25 ... Support ring (second support), 28 ... Lever.

Claims (1)

[Claims] 1. A clamp main body which forms a tubular body and has a hole penetrating the inner and outer peripheral portions formed in at least three locations at equal intervals in the circumferential direction, and a pipe is inserted into the clamp main body. A slider having an outer peripheral portion of the clamp body movably fitted in the axial direction and at least three hole portions penetrating the inner and outer peripheral portions formed at positions overlapping the respective hole portions of the clamp body; At least three ratchets that are arranged over the holes and the holes of the slider that overlap the holes of the clamp body, and that grip the pipes inserted into the clamp body from the outer peripheral side, are provided on the clamp body. A first support body that rotatably supports each ratchet in a direction intersecting the axial direction of the clamp body and the slider is provided in the axial direction. A second support body that rotatably supports each ratchet at a position different from that of the first support body in a direction intersecting the axial direction of the slider, and the ratchet for the slider. A spring for applying a force in a direction for rotationally displacing toward the center of the clamp body, and a slider provided in the clamp body for moving the slider in a direction for rotationally displacing the ratchet toward an outer peripheral portion of the clamp body. A pipe clamp comprising: a lever.